Deep-well pump.



Patented Jan. 25, 1916.

3 SHEETS-SHEET l.

. KROGH.

DEEP WELL PUMP.

M APPLICATION FILED MAR. 14| 1912. wwwa,

F. W. KROGH.

DEEP WELL PUMP.

APPLICATION FILED MAII. I4. 1912.

Patented J an. 25, 1916.

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'3 SHEETS-SHEET 2.

INVEN TOR WITNESSES Mya.

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INVENTOR gauw.

ATTURNEK F. W. KROGH.

DEEP WELL PUMP.

APPLICATION man MAR.14,1912.

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M. A L

WTNESSES W. KROGH, OF SAN FRANCISCO, CALIFORNIA.

DEEP-WELL PUMP.

Specification of Letters Patent.

Patented Jan. a5, 191e.

Application led March 14, 1912. Serial No. 683,674.

To all whom t may concern:

Be it known that I, FERDINAND W. Knoon,

' of San Francisco, California, have invented interior part of the casing I provide an auX-.

certain new and useful Improvements in Deep-Well Pumps, whereof the following is a specification.

My invention relates to centrifugal pumps in general way but more particularly of that class employed in deep wells where water 1s below the suction limit and are usually constructed in plurality of sections or stages having an impeller in each section. I shall|` refer hereinafter for the purpose of this application to these sections singly, as they are identical in form and construction and operate in the same manner, in which my invention consists mainly in the construction of the casing and theimpeller operating therein.

It further consists of means oncthe impeller audits casing for balancing the run-Il ning part thereof while in operation. J

To carry out my invention in practice, I provide a pump casing with side spiral passages and form therein removable diffusion iliary chamber which is in constant commumcatlon with the receiving chamber and provide the same with outlet channel formed through the casing and the vanes, and communicating `with the exterior part thereof. At the upper part of the impeller I provide an annular Hange projecting inwardly from its outer wall upon Vwhich I make a plurality of interspaced depressions forming therebv a series of surrounding ribs in commonica-tion with opposite similar flange upon the casing which receive leakage from the running joints at that point and constitute a p ressure space between the flanges. To the bearing faces of the running joints between the impeller and the casing I provide riles or grooves spirally formed inwardly on the casing and outwardly on the impeller or vice-versa, respectively in opposite direction and are intended to check the leakage and force the water backward. I also provide other cooperating means to successfully operate m'y lnvention all of which will be hereinafter described in detail and the. novel combinations of the various parts whlch compose the same will be pointed out in the claims at the end hereof. The object of my invention is to simplify the construction of that class of yinventions and increase their efficiency vin operation.

In the accompanying drawings consisting of ,three sheets forming a part of the following specificat'ion I have illustrated my invention in what I believe to be the best method to carry the same in practice and in which,

Figure 1, is a vertical central sectional view of a deep well and its metallic casing having therein my improved system of pump consisting in this case, of two sections with their impellers in position therein showing a vertical section and a portion thereof in elevation showing also the pump and the deep well broken away in two places for the purpose of shortening the length of same. Fig. 2, is a cross sectiontaken on dotted line a-a of Fig. 1, showing particularly the outlet channel of the auxiliaryA chamber, and spiral passages. Fig. 8, is a cross section taken on dotted line b-b of Fig. 1, showing particularly the removable dlffusion vanes on the casing and the waterways on the lower part of the impeller in communication therewith. Fig. 4, is a cross section taken on dotted line 0 0 of Fig. 1 showing particularly the inward projecting iiange of the receiving chamber and the depressions and ribs thereon. Fig. 5, is an elevationof the impeller detached from the casing showing the water-ways and riilles upon the bearing faces. Fig. 6, is a broken vertical section of an enlarged portion of Aa bearing face of the casing showing the riiiies thereon. Fig. 7, is a vertical section of a portion of the casing in which the impeller y ing the weight of the impeller and its shaft Similar characters of reference denote likel parts throughout the several views.

Referring to the drawings 1 is a lower casing, 2 an upper casing and 3 the bottom of the lower casing while the upper part of this casing forms inthis case the bottom of the u per casing 2, thus forming two sections o a pumping plant as they appear below the water line A. The bottom 3 and the upper part of the casing 1 are removably secured in position for the purpose of adjusting or removing the impellers 4. from their respective section and which are mounted upon the shaft 5 supporting them in central position within-the casings.

The lower end of the impellers 1 fit in a central suction aperturev6 formed through the bottom 3 and'is provided with an annular depression 7 to form a. shoulder 8 which rests upon the upward annular projectionl 9 made around the suction aperture 6 of the bottom 3 and thereby supportwhen they are at a stand still.

Near the lower portion of the impeller are' water-Ways 10 shown in Figs. 1, 3 and 5, which are in communication with the suction aperture 6 and above the water-Ways is the receiving chamber 11 formed within the upper part of the impeller immediately opposite the auxiliary chamber 12 on the casing and in constant communication therewith in which leakage from the running surrounding joints between the impeller and its casing accumulate and pass under pressure into the auxiliarychamber 12 and out through the channels 13 into the well 14 as fully shown in Figs. 1 and 2. The upper edge of the receiving chamber 11 is provided with an annular inwardly projecting flange 15 corresponding with a similar Aflange 16 around the auxiliary chamber 12. The faces of these flanges are provided with inl terspaced recesses 17 which form surroundthrough the running joints at that point between the impeller and its casing and thus creating a pressure in the space between the lflanges 15v and 16 greater than the pressure below the Water-ways and thereby forcing the impeller to move downwardly to its nor mal position. At the lower portion of the casing are the diffusion vanes 21 in communication with the water-ways 10 and are adapted to increase the pressure on the waterpassing'at that point into the spiral passages 22 and 23 shown in Figs. 1 and 2. These vanes. are removably supported opposite the Water-ways 10 by a suitable frame consisting of a lower circular fiange 24 secured in place by screws at the lower part of ,the casing and an upper ring 26 projecting above the upper edges of the Water-ways 10, these features are shown in Figs. 1, 3 and in dotted lineFig. 7. y

As it appears in Fig. 1 the pumps are supported in position Within the well 14 by pipe 27 secured tothe upper part of the casing of the top pump by suitable flange 28. bolted thereon and form a water passage with an outlet 29 above the ground and the shaft 5 is supported in central position within lthe pipe just mentioned by an intermedial lange'30 projecting outwardly and secured -to the pipe by means of flanges 31 and bolts 32 and provided with inward projecting arms 33 yhaving lalvcentral sleeve 34: supporting in position therein a wood bushing 35 which forms the central bearing of the shaft, and the pump casin s are similarly provided to support the sha in central position therein. Surrounding the shaft and secured to the upper end of the wood bushing just mentioned is a cylindrical casing.` 36, having therein suitable packing and at its top end a loose Babbitt ring 37 to lpress the packing around the lshaft and thereby prevent- Ving the sand or other foreign matters to settle'in the bearing, as shown in Figs. 1 and 8. The vbearings are lubricated by means of a pipe 38 secured along the water passages 27 and the pump casing and connected to the bearing by means of extension pipe 39 and having at its topan oil cup 40 or other means* of supply. These features are. shown only in Fig. 1. On the bearing faces of the running joints between the impeller andthe casing Iare theriilles 41 for the purpose as above mentioned to check the leakage and force the water backward, and which are shown only in detailed Figs. 5, 6 and 7.

In operation the water passes from the suction aperture v6 into the water-ways at the lower end of the impeller and then through the removable diffusion vanes 21 into the spiral passages 22 and 23 of the casing and therefrom into the next impeller and as the water enters therein the pressure increases and continue so from section to Licence ber 12 into the well 14 through the channels 13 which forms the outlet, but if the pressure increases and forces the impeller to move upwardly and partly closes the passage between the inner edge 19 and 2() of the flanges 15 and 16 that will create a pressure in the space between the flanges greater than the pressure against the impeller and force the same back to its normal position thus preventing the ,upper part of the impeller to bear against the casing.

The modification shown in Figs. 8, 9 and 10 relate only to the described receiving chamber 11 of the impeller and the flange 16 of the casing, in which I dispense entirely with the receiving chamber, and simply form instead avhollow space 42 to reduce the metal at that part of the impeller, and extend the flange 16 of the casing inwardly to form ya narrow passage 43 around the shaft 5 and a larger space 44 between the flange 16 and the top part `of the impeller, thus constructed the leakage passing through the running joints between the impeller and the casing forces its way into the space 44 then through the narrow passage 43 into the auxiliary chamber 12 and out into the well 14 through the outlet 13. In this case if the impeller under pressure move upwardly that will close the narrow passage 43 and create a pressure between the flange and the upper part of the impeller greater than the upward pressure, and the result will be as previously mentioned.

Believing I have produced novel and useful improvements in that class of inventions and having described the same to enable others skilled in the art to which it appertains what I claim and desire to secure by United States Letters Patent is:

1. In a centrifugal vertical pump, the combination with the impeller and its casing, a discharge passage in said casing, inwardly projecting annular flanges upon said impeller and said casing communicating with said discharge passage and recesses upon said* flanges forming therebetween pressure chambers when said flanges come together.

2. In a centrifugal pumpthe combination with the impeller and its casing, an annular flange on the upper part of said impeller, projecting inwardly from the outer edge thereof, a corresponding flange on the casing` facing said impeller flange and each provided with a plurality of recesses upon their outer faces adapted to form pressure chambers therebetween when said flanges come together.

3. In a centrifugal pump, the combination with the impeller and its casing, a receiving chamber in said impeller and a discharge chamber in said casing in communication with said receiving chamber, inwardly projecting annular flanges upon said impeller and said casing and recesses upon said flanges forming therebetween pressure chambers when said flanges come together.

4. In a centrifugal pump, the combination withthe impeller and its casing, a receiving chamber at the upper end of said impeller adapted to .receive leakage from the running joints, a discharge chamber rovided with an outlet in communication with said receiving chamber and inwardly projecting flanges on the'edges of said receiving and dlscharge chambers having means adapted to forma pressure chamber therebetween.

5. In a centrifugal pump, the combination with the impeller and its casing, a receiving chamber in the impeller, an auxiliary chamber in the casing, flanges projecting inwardly from the edge of said chambers and provided with interspaced recesses adapted to form-pressure chambers therebetween, and a channel in said casing chamber adapted to discharge vleakage under pressure into the well from said chambers.

6. A centrifugal pump comprising in combination a casing provided with a water passage, an impeller in said casing provided with a suction inlet in communication with said water-passage, a chamber in said impeller above the suction inlet and adapted to receive leakage from the running joints of the impeller, an auxiliary chamber in the casing provided with an outlet adapted to discharge said leakage, inwardly projecting flanges on said recelving and auxiliary chambers and interspaced recesses on said flanges therebetween.

7. A centrifugal pump comprising in com# bination a casing provided with a waterpassage, an impeller in said casing provided with a suction inlet, .a chamber in said impeller in communication with the joints bej tween said impeller and the casing and adapted to Vreceive leakage therefrom and means above said chamber to discharge said leakage.

8. A centrifugal pump comprising, in combination, a casing provided with a water-passage, an impeller in said casing provided with a suction inlet and water-ways, a chamber on the impeller above said waterways, inwardly projecting flange on said chamber adapted to receive leakage between the joints of said impeller and the casing andan auxiliary chamber in the casing provided with an outlet adapted to discharge said leakage.

9. In combination with a pump casing lprovided with assages, an impeller in said In testimony that I claim the foregoing I casing provide with inlet suction and wahave hereto set my hand this 7th day of ter Ways, intermedial vanes in said casing March,`1912, in the resence of witnesses.

below said water ways in. communication FER-DI AND W. KROGH. 5 with said inlet suction and said passages Witnesses: v l

and means secured in said tcasing for adjust- O. J. PoULsEN,

ing and removing said vanes. E. P. MoMUR'rRY. 

